Impregnation and digestion of wood chips

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...

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Details

162 38, 162 57, 162243, D21C 102, D21C 322

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active

041904907

ABSTRACT:
A mixture of wood chips and impregnation liquor is continuously passed through an impregnation zone, the mixture is agitated throughout said impregnation zone to maintain the consistency of the mixture constant and the residence time of the chips uniform throughout said impregnation zone, the mixture is withdrawn from said impregnation zone, excess liquor is removed from the chips and said chips are then digested in a cooking zone.

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patent: 3802956 (1974-04-01), Backlund

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